Clam-shell bucket.



J. W. FRAZIER & J. POX.

GLAM SHELL BUCKET.

APPLIOATION FILED MAR.1G, 1908.

921 ,821 Paitented May 18, 1909. v

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' WIT/VIEISLSLIS: INVENTORS,

' ju if. .9 @IRUECTOLOL y w @372 J. W. FRAZIER & J. H. FOX.

.OLAM SHELL BUCKET.

APPLICATION FILED MAR.16, 1908.

Patented May 18, 1909.

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W] TNESSES;

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AT%RNEY.

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J. W. FRAZIER & J. H. POX.

GLAM SHELL BUCKET. APPLICATION FILED MARJG, 1908.

Patented May 18, 1909.

4 SHEETS-SHEET 3.

WITNESSES.-

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J. w. FRAZIER & L11. FOX.

GLAll SHELL BUCKET.

APPLIOATIOI FILED HA3. 16, 1908.

- Patented May 18,1909.

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nvV zv oRa, BY *4 A? ATTERNEY HZITNESSL'S:

.UNiirED STATES mmmJam r WFEAZQE'B 'AND 93 6mg:-

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Toal l ivllomitmay concern} a I a Be it known that-we, James W. FRAzmRmasons -H. Fox,.citizens' of the United States, residents of Cleveland,county .of'

- Cuyahoga, State of Ohio, have jointly invented a new and usefulImprovement in.

- drawn together are adaptedtogat er,up.or scoop 1n the materialwhichljthey arejthen V adapted to carry to a pointmore or lessrepositsuchload In the prevailing construction of clamshell buckets,two'rcables are required to motc,-and there, upon being;,opcned, to de-;

- operate the same, one regular'holstmg-cable to support and raise orlower thetbucket as a whole, and another to close athB-SOOOP members andso retain them untilthej bucket is to-be discharged.-

'2 1 The object of the present invention is the provision of a bucket ofthe .above general type that will require but asingle cable to ucket.and that of'supporting the same-incidentally to its raising andlowering and to its removal from one point to'another, 4

- To the'accomplishment of this and related objects, said invention,then, consists of the means hereinafter fully described andparticularlypointed out'in the claims. I

The annexed drawings and the following description set forth in detailcertain mechanism embodying the invention,'such' disclosed meansconstituting, however,'but several'ofvarious mechanical-forms in which'the principle of the invention maybe used.

said annexed drawings '1 is a side elevation of one type of clam s ellbucket in which "has been inco orated our several imptovemelltsi such 1shown in its 0pm Posltion; ig: 2 is a side e evatlon of .the sametype ofbucket, but'in its closed position; Fig. 3 is a central verticaltransverse section of such bucket likewise in its closed gbgiyion; F '4'is a section through the 'ng: cabs utilized inconnection withSpecification of Letters Patent. p I gramea lmeh' 16,1908. s nsin421392. I

rform both the operation of closing the steame my 1a; isoe.

suchlbucket, showing the manner of incorporatingtherein an e ectncalconductor, the

function ofv which will be hereinafter more fullydescribed; Fig. 5 is a:sectional view similar to that in Fig.3, showing a slight. modificationin construction; -Fig. 6 is a plan view of the top frame constitutin aportion .of -the structure shown in Fig. '5;'- igs..-7-and '8 arerespectively a-plan viewand'a side elevation showing the arrangementofcables employed in; connection. with a/buoket constructed as in Fig.5;' Fig.r 9 is a. transverse cross-section of. the cable containing theelectrical conductors utilized-7m connection with such bucket; Fig; 10is]: side elevation; 1

showing an adaptation of our invention to a second type of bucket; Fig.11 is a-pa-rtial vertical transverse cross'section anda partial endelevation of such bucket Fig;-12 is a sec tional detailof the same;,andaF ig.13-shows the ap lication' of our-mventionto a simpledumpucket;

1' Referring first ofall tothe I bucket.

illustrated in Figs. -1-- toy5, inc usivey such bucket will beseen tocomprise primarily a" frame Ato'which the various other-=parts of thebucket are either directly or indirectly connected. These other artsinclude-the twoscoo members B; the orrn of which is a matter 0indifference, being dependent upon the character of the material whichthe bucket is to handle; The outerends'of members B areconnected toframc'iAz means of links b; the inner-"ends beararms pivotally connectedtogether and joined by means of a chain 6, one oneachside ofthe bucket,to the frame A, by means of'whieh the bucket is prevented from openingmore widely than is desirable; "The dis' ition of the pivotal axis aboutwhich the uckets' thus openand close, and the -oints of pivotalconnectionof links, 12 are so etermined' that the weight of the scoopmcmbers Bte-nds to throw the bucket open. The inclusion "in ion themembers of a load-ofmateriah-will course increase this tendencyVerticallv 'tums of the hoisting cable, or, rather cables,

D, there being two sueh cables' as 'isordinarily' the case indevices-of-this sort moan. to hold-the bucket" against.- rotating Timultiplicationof sheavesla c in frame A am blocks 10 respectively,"about which we fsuch'icab epasses is'governcd' bv the list-fatconsiderations, viz. that of the gt 0W6! available-and the character ofthe service re-' hoisting cables be connected as shown in- Figs. '3 andwith block .0 or whether they be connected with frame A; their innerends are of course attachedto the winding drum D of. the hoisting theusual way. t will be obvious that when blo'ckO is drawn approximately.against the under side of frame A (see Fig.2) it is'in efiect a partofsuch frame and the bucket is then adapted to be supported or raised bymeansof' the hoisting cable. Embodied in a unitary structure with'blockC are means for securing the same to the inner pivotally connected arms6' of scoop members B, operation oi snobs-means being electrically'controlled as will now a pear. device illustrated in igs. 1 to 3, thisengaging mechanism comprises two pendent latch member'sc' normally heldin their outer positions by a spring 0 in which positions they areadapted to hook under a frame B form-v in effect the pivotal axis ofarms-b. Located between the two latches is a solenoid or electro-magnetC so disposed that upon being energized it will drawlatch members 0inwardly, disengaging the same from the frame. ,Asshown. in theparticular form of the device in question, electrical connections. tosuch magnet are had through suitably insulated conductors d embedded'one in each of'the twp hoisting cables D, Fig. 4.

The operation of the form of the inoperative, or open, position of thebucket illustrated in Fig. 1',.it may be swung about and finallyvlowered onto the ile of ore, coal orother material being hand ed, all.by. proper movement of the derrick'boom or other support over whichcables D ass and by paying out: such cables. W ion the bucket .thns'rests. on the pile, any further ayingout of cables D will permit block 0to rop to its lower position, where it engages frame B m' the mannerpreviously de-- scribed. Upon no'wdrawing. in on said cables the initialeffect will be to bring such block back again to its normal positionjust engine or.motor,F1g. 7 in In the form 01' "our bucket. Estdescribed may now be briefly reviewed.

winding drum C such as that illustrated in characterized by having awinding drum A .chainsa are wound.

beneath frame A, and thereby, through its connection with frame B, toclose the scoop members B, this being the position of parts shown inFig. 2.- In this condition the bucket may be swung'around, or carried incaseit 1s. 5

suspended from a trolley, to the place where the material is to bedumped. Thereupon, by simply closing the electric circuit throughsolenoid C,'the frame B is disengaged from swing open as shown in Fig.1, which is the position assumed at the beginning of this paragraph. r

the block and the scoop members allowed to may beemploycd here ln the,modified construct on illustrated in Fig. 5 the same general type ofbucket 15 shown, the only chanigebeing in the arran ement of theelectrica y controlled device ordisengaging theblock C from the innerends (of the scoop members. Here the electro-magnet C is vertically disosed, and the armature a in the form of a p unger, is connected by ameans of toggle links 0 with the latches c"$o that upon energization ofthe magnet the latches will be disengaged. A furthermodification-incorporated in this same connection 4 consists invthe useof a separate cable Cfor the conductors c" as shown irfFig. 9. Suchcable is kept drawn in and still left" free to follow the movements ofthe bucket by means of a Figs. 7 and S, or by other-equ valent, means.InFigs: 10, 11 'andfl 12, is.illustrated the manner of adapting ourinvention-to a'clam shell bucket of another type, which is incorporatedin the structure of frame A'by rotation of which drum the inner ends ofthe scoop members B are adapted to be drawnupwardly, through the mediumof chains (1 connected with a shaft 6 joining the ends of armsb. In thisbucket as now constructed 'a'separate cable is required to wind in andunwind chains 0 in order to open and close the bucket. To adapt ourinvention to the bucket, we construct the -winding drum in effect of twoparts, an outer art or parts a, about which the hoisting calile orcables D are wound (there being two of these as before), and an innerdrum (1, about which the The outer drum is normally "connected with theinner drumby means of springressed plungers e, the reti'actioir o'iwhich is efiected by means of electro-magnets E in the same manner aswas the withdrawal of the latches c in the previously described device.When thus retracted the smaller. inner drum is free to rotate andindependently of the outer drum and the bucket will open. In conjunctionwith the outer drums a there is provided a coil spring E, Fig. 12, theefl'ect of which is to maintain suchdrums with a'sufficient length ofcable wound thereabout, when the bucket is'restin'g on the pile ofmaterial, so that when the plungcrs'are again allowed-to connect the 115 two drums and the cables D thereupon drawn in, the initial effectwill be to rotate the inner drum and draw u the inner ends of the scoopmembers. Vhen these are finally drawn up further winding in of thecables 20 cancel limited'in fts applioatigin to this-single type ofbucket, oi' came'r. Accordingly we show in I3, the sametype-{of hoistingmechanism illustrated in Figs. 10,1 1 and 12, but'applied ti)'an'jordinary dump-bucket, it being connection of the hoisting cablewith the trapof the bucket that is here electrically controlled, insteadof connection of such cablewvith :the scoop-members of a clamshellbucket. Obviously the principle of operation remains the "same where asingle trolled.

Other modes of applying the rinciple of our invention may e employeinstead of the one explained, change being made as regards the mechanismherein disclosed provided the means stated by any one of the followingclaims or the equivalent of such stated means be employed.

We therefore particularly point out and distinctly claim as ourinvention 1. In a device of the character described, the combination ofa frame; scoop members movably connected with said frame; and I havingtheir outer ends pivotally connected with said frame; an externallysupported block vertically movable beneath said'frame and adapted toengage said frame to support and raise the same; means *borne b saidblock adapted normallyto mechanica ly-engage the inner'ends of saidmembers; and

electrical means adapted to "render said engaging means inoperative.

6. In a deviceof'the -character described,

the combination ofa frame; scoop members having their-outer ends"pivotally connected with said frame; a 'block'vertically movablebeneath said frame and adapted to engage said frame to support andraisethe same; means borne by said block adapted normally tomechanically engage the inner ends ofsaid members; electrical meansadapted to render said engaging means/inoperative and a cable connectedwith said block and adapted to draw the same against said frame.

7. In a device of the character described, the combination of a frame;scoop members having their outer ends 'pivotally con nected with saidframe; a blocii vertically movable beneath said frame and adapted toengage said frame to su port and raise 'e'same; latch members borne bysaid hi 0c and adapted normally to engage the n 1' ends of said scoopmembers; electrical, means adapted to withdraw said latch members fromsuch engagement; and a cable connected with said block and adapted todraw the same against said frame.

electrically controlled means adapted to be i mechanically connectedwith said members i with said frame; a block vertically movableto drawthe same toward said frame. said frame to support and raise the same;latch 2. In a device of the character described,

the combination of a frame; scoop members pivotally connected with saidframe; hoisting means for the device adapted to be mechanicallyconnected with said members to draw means for controlling suchconnection.

; 3.. In a device of the character described; the combination of aframe; scoop members having their outer ends pivotally connected withsaid-frame; a hoisting cable attached to said frame and adapted to bemechanically with the inner ends of said memb rs to draw the same towardsaid frame; and electrical means for controlling such connection.

5. In a device of the character described,

the same toward said frame ;-and electrical f 8. In a device of thecharacter described, the combination of a frame; scoop members havingtheir outer ends pivotally connected beneath said frame and adapted toengage members borne by said block and adapted normally to engage theinner ends of said scoop members; an electro-magnet adapted, whenenergized to withdraw said lat ch members from such engagement; a cablepassing a plurality of times between said frame and block and adapted todraw the latter againstsaid frame; and electrical connections for saidmagnet provided in conjunction with said cable.

9. In a device of the character described,

the combination of a frame; scoop members;

links pivotally connecting the outer ends of said members with saidframe; a transverse member forming a pivotal connection for the innerends of said scoop members; a block vertically movable beneath saidframe and adapted to engage said frame to support and raise the same;pendent latch members z-idapted normally to engage the member connectingthe inner ends of said scoop members an electro-magnet ada ted, whenenergized, to Withdraw said late members fromsuch engagement ;'a cablepassing a lurality 65th combination of a frame; scoop members i of timesbetween saidframe and b ock and eeesei adapted to draw the letteragainst said; 1L The combination with a device of the 16 frame; andelectrical connections for said' magnet provided in conjunction withsaid I cable.

10. In a, device of the character described, the combination of a frame;scoop members movably connected withseid frame hoisting l characterdescribed; of hoisting means therefor, such means including a; cable;and electrical connections to said device includin a conductor embeddedin said hoisting 021' Le.

Signed by us 28th day of February,

means for the device, such means including" 1908.

two cables adaptedeto be connected with said 1 members to draw the sametows-rd said:

' frame; electrical means for controlling such connection; andelectrical connections for;

said means including two conductors embed- Q deed in said hoistingcables respectively.

JAMES W. FRAZIER.

JOHN H. FOX.

Accessed by I MARY ISRAEL, JNo. F, OBEBLIN.

